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Journal of Biological Sciences

Year: 2006 | Volume: 6 | Issue: 6 | Page No.: 1011-1016
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Research Article

Estimating Leaf Nitrogen Status of Strawberry by Using Chlorophyll Meter Reading

Semiha Guler, Idris Macit, Aysen Koc and Hayriye Ibrikci

ABSTRACT

Measurement of leaf N through chlorophyll meter reading is of high importance to monitor leaf N status of plant throughout growing season. In present study, five short-day strawberry (Fragaria x ananassa Duch) cultivars including Sweet Charlie, Redlans Hope, Kabarla, Festival and Camarosa, were grown in 2003-2004 growing season to investigate the possibility of usage of Chlorophyll (CHL) meter reading to estimate leaf N content. Fully matured leaves were used for related measurements. Leaf CHL was measured by using SPAD 502 chlorophyll meter. There was significant correlation (r = +0.84, p<0.001) between leaf N and CHL reading regardless of the cultivars. The results indicated that leaf N and CHL contents of strawberry cultivars showed great variability. The cultivar containing highest leaf N also contained the highest CHL. Kabarla had the highest leaf N (2.46% N) and CHL (33.90 unit), followed by Redlans Hope (2.18%N, 31.65 unit). Sweet Charlie had the lowest leaf N (1.68% N) and CHL reading values (29.30 unit). Leaf N status of the cultivars used in this experiment can be estimated using the regression equations belong to each cultivar. However, due to high significant correlation between leaf N and CHL reading value irrespective of cultivar, leaf N content of any cultivar can be estimated by using the regression equation y = -2.1309+0.1344x, where x is CHL reading value and y is leaf N.
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